"""
instance_cache.py

This file is part of a program that implements a Software-Defined Radio.

Copyright (C) 2014 by G3UKB Bob Cowdery

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

The authors can be reached by email at:

	bob@bobcowdery.plus.com

"""

"""
Singletons
"""

instCache = {}

def addToCache(name, instance):
    """
    Add a class instance
    
    name        --  name of the instance
    instance    --  the created and initialise instance
    
    """
    
    instCache[name] = instance
    
def getInstance(name):
    """
    Get the one and only class instance
    
    name    --  name of the instance
    
    """
    
    if name in instCache:
        return instCache[name]
    else:
        return None
